Has there been a change in the policy? On the website, this language no longer appears:
REDEMPTIONS ON KLM – ROYAL DUTCH AIRLINES
Valid on Delta-marketed, KLM-operated flights for use globally on published Main Cabin fares booked in Y, B, M, S, H, Q, K, L, U, T, X or V class to Business Class.
Valid on all KLM-marketed, KLM-operated flights from published Main Cabin fares in Y, B, M, S, H, Q, K, L, U, T, X, or V class to Business Class.
Global Upgrades on KLM flights must be confirmed 24 hours prior to departure.
For flights departing Amsterdam, Global Upgrade Certificates may be applied prior to check-in either with a KLM ticketing agent or at a KLM Crown Lounge.
Global Upgrade Certificates may not be used to waitlist for a KLM-operated flight.
Now this is on the website, which is confusing as it sets up two circumstances that are identical (KL operated, DL Marketed):
For travel on KLM-operated, Delta-marketed flights this certificate may be used to upgrade on published fares booked in Y, B, M, H, Q, K, L, U, T, X or V class and all fare classes upgrade into Z class. For travel on KLM-operated flights marketed by either Delta or Air France, this certificate may be used to upgrade on published fares booked in Y, B, or M class. Fares booked in B or M are eligible to upgrade into O class, while fares booked in Y are eligible to upgrade into Z class.
I am trying to apply a certificate to a KL operated KL marketed flight, and I'm told I need Y class. I no longer see published information on KL operated KL marketed.